Fixing the UI differeces between Mac/Windows

[Rocketdrive 108]

I use both platforms, here's what I miss:

Windows: a fullscreen mode, i.e. without window bar - or is it called title bar? The one that stretches over the whole app, but houses only the min, max and close buttons. Think of macOS's fullscreen mode, or fullscreen mode for webbrowsers (F11 in most modern browsers, on most platforms). Tabs must stay visible, though.

Mac: multiple palette columns. We have them in the windows version, please add them for Macs, too. While I see that some users circumvent this limitation via the multiple windows mode (not sure this is the correct name), that is a no go for me. I prefer the more elegant monolithic, non-overlapping and watertight UIs